All good responses from what I've read so far. Here's my 2 cents.
So long as the prepwork beneath the paint is done impeccably and the topcoat and clearcoat are laid down smooth and wetsanded to perfection, any color you choose will be a winner. Obviously everyone has their own color preferences (my preferences from the colors you've suggested are green, orange, maroon in that order) and that will affect to some degree whether or not the bike is worth looking at. Some people avoid green like the plague, others love it; but like I said, if you've got quality prepwork and quality paint laid perfectly, some people will be open minded to a color they otherwise wouldn't have considered.
Prost!